Two system heating maintenance Basement furnace 21yr old Trane 80% efficient single stage natural gas furnace Pulled and cleaned flame sensor Changed 20x25x4 filter Blower in OK condition Capacitor tested 15.2mfd (rating 15) Gas pressure 3.5 0ppm carbon monoxide present in supply duct during operation Combustion test well within nominal ranges for a healthy heat exchanger Temperature rise 38⁰ (35-65 rating) Made sure pressure switch port free of soot buildup No concerns found with this Furnace 2nd floor furnace 4yr old Trane 80% efficient single stage natural gas furnace Pulled and cleaned flame sensor Changed 16x25x1 filter Blower clean Gas pressure 3.5 0ppm carbon monoxide in ductwork or around the furnace Temperature rise 44⁰ (30-60 rating) Made sure pressure switch port is free of soot buildup No concerns found
